| Category: |
Utility Scripts |
| Author/Contact Info |
grinder on perlmonks |
| Description: |
A little script that provides an easy way of pinging all
the hosts from, e.g. 192.168.0.1 to 192.168.0.100. The
output can be tailored in various ways. |
#! /usr/bin/perl -Tw
use strict;
use vars qw/ $opt_b $opt_n $opt_q $opt_r $opt_s $opt_t /;
use constant TIMEOUT => 1;
use Getopt::Std;
use Socket;
use Net::Ping;
getopts( 'bnrqst:' );
$opt_r = 1 if $opt_n or $opt_s;
$opt_q = 1 if $opt_b;
$opt_t ||= TIMEOUT;
die "This script must be installed setuid root.\n" unless $> == 0;
my $first_taint = shift or die "No first IP address given (e.g. 172.17
+.1.1)\n";
my $last_taint = shift or die "No last IP address given (e.g. 127)\n"
+;
my ($net,$first) = ($first_taint =~ /^(\d{1,3}\.\d{1,3}\.\d{1,3})\.(
+\d{1,3})$/ );
die "Couldn't determine the network part in $first_taint.\n" unless $n
+et;
die "Couldn't determine the host part in $first_taint.\n" unless $firs
+t;
my ($last) = ($last_taint =~ /^(\d{1,3})$/ );
die "Couldn't determine the host part in $last_taint.\n" unless $last;
($last, $first) = ($first, $last) if $last < $first;
my $p = Net::Ping->new( 'icmp' );
foreach my $host ( $first..$last )
{
my $ip = "$net.$host";
my $hostname = do {
if( $opt_r and my $resolve = gethostbyaddr( inet_aton($ip), AF
+_INET )) {
$resolve =~ s/\..*$// if $opt_s;
$resolve .= " ($ip)" if $opt_n;
$resolve;
}
else {
$ip;
}
};
if( $p->ping($ip, $opt_t) ) {
print $hostname;
print ' is reachable.' unless $opt_b;
print "\n";
}
elsif( ! $opt_q ) {
print "$hostname is NOT reachable.\n";
}
}
$p->close();
=head1 NAME
pinger - ping a range of hosts
=head1 SYNOPSIS
B<pinger> [B<-bnqrs>] [B<-t> timeout] host last
=head1 DESCRIPTION
Ping a range of hosts using ICMP.
=head1 OPTIONS
=over 5
=item B<-b>
Brief. Do not print the "is reachable/is NOT reachable" text.
Probably needs B<-q> as well to be of any use to a program downstream.
=item B<-n>
Numeric. Print the numeric IP address as well as the resolved host nam
+e. (Sets B<-r>).
=item B<-q>
Quiet. Only report hosts that are pinged successfully.
=item B<-r>
Resolve. Resolve the numeric address to a FQDN host (implies -q unless
+ -n).
=item B<-s>
Short. Like B<-r>, but resolves the numeric address to a simple host n
+ame (stopping at the first dot).
=item B<-t timeout>
Timeout. Set the time out to t seconds (defaults to 1). A low timeout
+value is used as this
script is destined to be used on internal networks where it is normal
+to have sub-second
response times. The value may be easily edited in the source to a high
+er value if required.
=back
=head1 EXAMPLES
C<pinger 192.168.0.1 10>
Pings the machines from 192.168.0.1 to 192.168.0.10. Sample output loo
+ks like:
192.168.0.1 is reachable.
192.168.0.2 is NOT reachable.
192.168.0.3 is reachable.
192.168.0.4 is reachable.
192.168.0.5 is NOT reachable.
192.168.0.6 is reachable.
192.168.0.7 is NOT reachable.
192.168.0.8 is reachable.
192.168.0.9 is reachable.
192.168.0.10 is reachable.
C<pinger -r 192.168.0.1 6>
Pings the machines from 192.168.0.1 to 192.168.0.6 and resolves the ho
+stnames. In the following
example no A record for 192.168.0.3 exists, so the numeric IP address
+is used instead.
profane.example.com is reachable.
slothrop.example.com is NOT reachable.
192.168.0.3 is reachable.
godolphin.example.com is reachable.
stencil.example.com is NOT reachable.
porpentine.example.com is reachable.
C<pinger -n 192.168.0.1 6>
Like the above, but also includes the numeric IP address alongside the
+ resolved host name.
profane.example.com (192.168.0.1) is reachable.
slothrop.example.com (192.168.0.2) is NOT reachable.
192.168.0.3 is reachable.
godolphin.example.com (192.168.0.4) is reachable.
stencil.example.com (192.168.0.5) is NOT reachable.
porpentine.example.com (192.168.0.6) is reachable.
C<pinger -sq 192.168.0.1 6>
This time, only display the local hostnames without the domain, and on
+ly report hosts that are pinged
successfully.
profane is reachable.
192.168.0.3 is reachable.
godolphin is reachable.
porpentine is reachable.
C<pinger -bq 192.168.0.1 6>
Report the IP addresses of all hosts that are pinged successfully.
192.168.0.1
192.168.0.3
192.168.0.4
192.168.0.6
=head1 BUGS
Due to the way Net::Ping works, and TCP/IP in general, this script
must be installed setuid root. In light of this constraint, the
script runs in tainted mode. To install the script, run the following
command:
C<chmod 4555 pinger>
The way the behaviour is controlled by the command-line switches is
unnecessarily obfuscated and should be cleaned up. This is a by-produc
+t
of the script's evolution. By and large, however, they tend to do
The Right Thing.
=head1 SEE ALSO
L<Net::Ping>
=head1 COPYRIGHT
Copyright 1999-2001 David Landgren.
This script is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
=head1 AUTHOR
David "grinder" Landgren
eval {join chr(64) => qw[landgren bpinet.com]}
=cut
|
|
Re: pinger - ping a range of hosts
by spaz (Pilgrim) on Mar 23, 2001 at 23:09 UTC
|
I only have 2 comments really :)
- Your regexp for IP's is flawed, I can enter 999.999.999.999, which obviously isn't a real IP.
I found something similar to this in the Ram book
(?:(?:[01]?\d?\d|2[0-4]\d|25[0-5])\.?){4}
Disclaimer: I realize this may not be the most efficent regex, but it does work, right?
- If you're on a UNIX machine, you could always use nmap
-- Dave | [reply]
[d/l] |
|
|
m{
^ ( \d | [01]?\d\d | 2[0-4]\d | 25[0-5] )
\. ( \d | [01]?\d\d | 2[0-4]\d | 25[0-5] )
\. ( \d | [01]?\d\d | 2[0-4]\d | 25[0-5] )
\. ( \d | [01]?\d\d | 2[0-4]\d | 25[0-5] )
$ # from the Perl Cookbook, Reci
+pe 6.23,
}xo # pages 218-9, as fixed in the
+ 01/00 reprint
HTH
--
idnopheq
Apply yourself to new problems without preparation, develop confidence in your ability to to meet situations as they arrise.
| [reply]
[d/l] |
|
|
١.٢.٣.٤ is not a valid IP, it matches the regex though :)
| [reply] |
Re: pinger - ping a range of hosts
by Anonymous Monk on Jun 02, 2010 at 15:23 UTC
|
Very useful and exactly what I was looking for hoping to more more of the code
| [reply] |
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